<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>在线考试系统</title>
    <!-- Bootstrap CSS -->
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@3.3.7/dist/css/bootstrap.min.css" rel="stylesheet">
    <link href="../css/common.css" rel="stylesheet">
    <style>
        body {
            margin: 0;
            padding: 0;
            font-family: 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
            background-color: #f4f7fa;
            color: #333;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        
        .header {
            background-color: #3498db;
            color: white;
            padding: 20px 0;
            text-align: center;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }
        
        .header h1 {
            margin: 0;
            font-size: 28px;
            font-weight: 600;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px;
            flex: 1;
        }
        
        .main-content {
            display: flex;
            flex-direction: column;
            align-items: center;
            margin-top: 30px;
        }
        
        .card {
            background-color: white;
            border-radius: 8px;
            box-shadow: 0 4px 12px rgba(0,0,0,0.05);
            padding: 30px;
            margin: 20px 0;
            width: 100%;
            max-width: 800px;
            text-align: center;
        }
        
        .btn-primary {
            background-color: #3498db;
            border-color: #2980b9;
            padding: 10px 20px;
            font-size: 16px;
            margin-top: 20px;
        }
        
        .btn-primary:hover {
            background-color: #2980b9;
            border-color: #2980b9;
        }
        
        .footer {
            background-color: #2c3e50;
            color: #ecf0f1;
            text-align: center;
            padding: 20px 0;
            margin-top: auto;
        }
        
        .features {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-around;
            margin: 30px 0;
        }
        
        .feature {
            flex: 0 0 30%;
            margin: 10px;
            padding: 20px;
            background-color: white;
            border-radius: 8px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.05);
            text-align: center;
        }
        
        .feature-icon {
            font-size: 40px;
            color: #3498db;
            margin-bottom: 15px;
        }
        
        @media (max-width: 768px) {
            .feature {
                flex: 0 0 100%;
            }
        }
    </style>
</head>
<body>
    <div class="header">
        <h1>欢迎使用在线考试系统</h1>
    </div>
    
    <div class="container">
        <div class="main-content">
            <div class="card">
                <h2>高效、便捷的在线考试平台</h2>
                <p>为教师和学生提供简单易用的考试管理服务</p>
                <a href="student/login.html" class="btn btn-primary btn-lg">立即登录</a>
            </div>
            
            <div class="features">
                <div class="feature">
                    <div class="feature-icon">
                        <span class="glyphicon glyphicon-education"></span>
                    </div>
                    <h3>便捷的考试管理</h3>
                    <p>教师可轻松创建、管理考试，学生可便捷参加考试并查看成绩</p>
                </div>
                <div class="feature">
                    <div class="feature-icon">
                        <span class="glyphicon glyphicon-stats"></span>
                    </div>
                    <h3>成绩分析</h3>
                    <p>自动评分与数据分析，帮助教师了解学生学习情况</p>
                </div>
                <div class="feature">
                    <div class="feature-icon">
                        <span class="glyphicon glyphicon-time"></span>
                    </div>
                    <h3>灵活的考试时间</h3>
                    <p>支持限时考试，随时随地进行学习评估</p>
                </div>
            </div>
        </div>
    </div>
    
    <div class="footer">
        <p>在线考试系统 &copy; 2023 版权所有</p>
    </div>

    <!-- jQuery and Bootstrap JS -->
    <script src="https://cdn.jsdelivr.net/npm/jquery@3.4.1/dist/jquery.min.js"></script>
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@3.3.7/dist/js/bootstrap.min.js"></script>
</body>
</html>